Ducks Unlimited (DU) is an American 501(c)(3) nonprofit organization dedicated to the conservation of wetlands and associated upland habitats for waterfowl, other wildlife, and people.

In 1927, an offshoot of the Boone and Crockett Club was created specifically for sport bird management and operated until 1930 as the American Wild Fowlers.

[2] In 1937, Knapp, Robert Winthrop, E.H.Low and a small group of conservation philanthropists decided to focus on the decreasing waterfowl populations, and the habitat necessary to sustain them in Canada.

[15] Their sources of revenue include federal and state habitat reimbursements, conservation easements, sponsors, members, major gifts, donations, royalties, and advertisement.

The organization worked with the National Fish and Wildlife Foundation and the USDA Natural Resources Conservation Service to protect approximately 79,000 acres of waterfowl and other waterbird habitats.

[19] In 2015, Ducks Unlimited partnered with The Trust for Public Land to build an online database that tracked conservation and cleanup efforts following the Deepwater Horizon spill.

[20] On August 16, 2018, the National Oceanic and Atmospheric Administration (NOAA) announced a $1.8 million cooperative agreement with Ducks Unlimited to clean up oil spills and hazardous waste in the State of Texas from releases originating from the Gulf of Mexico.